import { ProjectRepository } from '@app/common/modules/project/repositiories';
import { HttpException, HttpStatus, Injectable } from '@nestjs/common';
import { CreateProjectDto } from '../dto';
import { BaseResponseDto } from '@app/common/dto/base.response.dto';
import { SuccessResponseDto } from '@app/common/dto/success.response.dto';
import { ProjectEntity } from '@app/common/modules/project/entities';
import {
  TypeORMCustomModel,
  TypeORMCustomModelFindAllQuery,
} from '@app/common/models/typeOrmCustom.model';
import { ProjectDto } from '@app/common/modules/project/dtos';
import { PageResponse } from '@app/common/dto/pagination.response.dto';

@Injectable()
export class ProjectService {
  constructor(private readonly projectRepository: ProjectRepository) {}

  async createProject(
    createProjectDto: CreateProjectDto,
  ): Promise<BaseResponseDto> {
    const { name } = createProjectDto;

    try {
      // Check if the project name already exists
      const isNameExist = await this.validate(name);
      if (isNameExist) {
        throw new HttpException(
          `Project with name ${name} already exists`,
          HttpStatus.CONFLICT,
        );
      }

      const newProject = this.projectRepository.create(createProjectDto);
      const savedProject = await this.projectRepository.save(newProject);

      return new SuccessResponseDto({
        message: `Project with ID ${savedProject.uuid} successfully created`,
        data: savedProject,
        statusCode: HttpStatus.CREATED,
      });
    } catch (error) {
      if (error instanceof HttpException) {
        throw error;
      }

      throw new HttpException(
        'An error occurred while creating the project. Please try again later.',
        HttpStatus.INTERNAL_SERVER_ERROR,
      );
    }
  }

  async deleteProject(uuid: string): Promise<BaseResponseDto> {
    try {
      // Find the project by UUID
      const project = await this.findOne(uuid);

      if (!project) {
        throw new HttpException(
          `Project with ID ${uuid} not found`,
          HttpStatus.NOT_FOUND,
        );
      }

      // Delete the project
      await this.projectRepository.delete({ uuid });

      return new SuccessResponseDto({
        message: `Project with ID ${uuid} successfully deleted`,
        statusCode: HttpStatus.OK,
      });
    } catch (error) {
      if (error instanceof HttpException) {
        throw error;
      }

      throw new HttpException(
        `An error occurred while deleting the project ${uuid}`,
        HttpStatus.INTERNAL_SERVER_ERROR,
      );
    }
  }

  async listProjects(
    pageable: Partial<TypeORMCustomModelFindAllQuery>,
  ): Promise<BaseResponseDto> {
    try {
      pageable.modelName = 'project';
      const customModel = TypeORMCustomModel(this.projectRepository);

      const { baseResponseDto, paginationResponseDto } =
        await customModel.findAll(pageable);
      return new PageResponse<ProjectDto>(
        baseResponseDto,
        paginationResponseDto,
      );
    } catch (error) {
      throw new HttpException(error.message, HttpStatus.INTERNAL_SERVER_ERROR);
    }
  }

  async getProject(uuid: string): Promise<BaseResponseDto> {
    try {
      // Find the project by UUID
      const project = await this.findOne(uuid);

      if (!project) {
        throw new HttpException(
          `Project with ID ${uuid} not found`,
          HttpStatus.NOT_FOUND,
        );
      }

      return new SuccessResponseDto({
        message: `Project with ID ${uuid} retrieved successfully`,
        data: project,
        statusCode: HttpStatus.OK,
      });
    } catch (error) {
      if (error instanceof HttpException) {
        throw error;
      }

      throw new HttpException(
        `An error occurred while retrieving the project with id ${uuid}`,
        HttpStatus.INTERNAL_SERVER_ERROR,
      );
    }
  }

  async updateProject(
    uuid: string,
    updateProjectDto: CreateProjectDto,
  ): Promise<BaseResponseDto> {
    try {
      // Find the project by UUID
      const project = await this.findOne(uuid);

      if (!project) {
        throw new HttpException(
          `Project with ID ${uuid} not found`,
          HttpStatus.NOT_FOUND,
        );
      }

      if (updateProjectDto.name && updateProjectDto.name !== project.name) {
        const isNameExist = await this.validate(updateProjectDto.name);
        if (isNameExist) {
          throw new HttpException(
            `Project with name ${updateProjectDto.name} already exists`,
            HttpStatus.CONFLICT,
          );
        }
      }

      // Update the project details
      Object.assign(project, updateProjectDto);
      const updatedProject = await this.projectRepository.save(project);

      return new SuccessResponseDto({
        message: `Project with ID ${uuid} successfully updated`,
        data: updatedProject,
        statusCode: HttpStatus.OK,
      });
    } catch (error) {
      if (error instanceof HttpException) {
        throw error;
      }

      throw new HttpException(
        `An error occurred while updating the project with ID ${uuid}`,
        HttpStatus.INTERNAL_SERVER_ERROR,
      );
    }
  }

  async findOne(uuid: string): Promise<ProjectEntity> {
    const project = await this.projectRepository.findOne({ where: { uuid } });
    return project;
  }

  async validate(name: string): Promise<boolean> {
    return await this.projectRepository.exists({ where: { name } });
  }
}